Effect of dynamic conditions on high-temperature corrosion of ternary carbonate salt for thermal energy storage applications

被引：0

作者：

González-Fernández, Luis ^{[1
]}

Intxaurtieta-Carcedo, Mikel ^{[1
]}

Bondarchuk, Oleksandr ^{[2
]}

Grosu, Yaroslav ^{[1
,3
]}

机构：

[1] Centre for Cooperative Research on Alternative Energies (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Alava Technology Park, Albert Einstein 48, Vitoria-Gasteiz,01510, Spain

[2] International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga, s/n, Braga,4715-330, Portugal

[3] Institute of Chemistry, University of Silesia in Katowice, Szkolna 9 Street, Katowice,40-006, Poland

来源：

Solar Energy Materials and Solar Cells | 2022年 / 240卷

关键词：

High temperature corrosion - High temperature applications - Potash - Thermal energy - Heat storage - Fused salts - Lithium compounds - Solar energy - Sodium Carbonate - Carbonation;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Li2CO3–Na2CO3–K2CO3 salt is one of the candidates for 3rd generation concentrated solar power (CSP) plants, aiming to increase the operational temperature. This rise of temperature significantly increases the corrosion issue of molten salts. However, there is a lack of studies focused on the effect of salt flow on the corrosion kinetic for this ternary carbonate salt. In this work, corrosion experiments under static and dynamic conditions are compared for SS310 subjected to ternary carbonate salt at 600 °C. A complete characterization of the corrosion layer, surface and cross-section, was carried out by means of SEM-EDX and XRD, while the molten salts after the corrosion tests were analysed by ICP-OES and XPS. The dynamic experiment exhibited an enlarged spallation of the corrosion layer, leading to a thinner and less homogeneous scale. This feature exposed the chromium containing phase and considerably increased the extent of its dissolution into the salt. The obtained results remark that the detrimental effect of dynamic conditions on the corrosivity of molten carbonate salt cannot be neglected and must be taken into account in the design of 3rd generation CSP plants. © 2022 Elsevier B.V.

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